initial feature-manifest language setup

Cargo.toml

@@ -14,6 +14,7 @@ members = [
     "components/support/guid",
     "components/support/interrupt",
     "components/support/jwcrypto",
+    "components/support/nimbus-fml",
     "components/support/rand_rccrypto",
     "components/support/rate-limiter",
     "components/support/restmail-client",

components/support/nimbus-fml/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "nimbus-fml"
+version = "0.1.0"
+edition = "2018"
+authors = ["Nimbus SDK Engineering"]
+license = "MPL-2.0"
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+clap = "2.33"
+anyhow = "1"

components/support/nimbus-fml/src/lib.rs

@@ -0,0 +1,5 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this
+* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+pub mod parser;

components/support/nimbus-fml/src/main.rs

@@ -0,0 +1,29 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this
+* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use clap::{App, Arg};
+use nimbus_fml::parser::Parser;
+use std::fs::File;
+fn main() -> anyhow::Result<()> {
+    let matches = App::new("Nimbus Feature Manifest")
+        .version("0.1.0")
+        .author("Nimbus SDK Engineering")
+        .about("A tool to generate code using an experiment feature manifest")
+        .arg(
+            Arg::with_name("manifest")
+                .short("m")
+                .long("manifest")
+                .value_name("FILE")
+                .help("Sets the manifest file to use")
+                .required(true)
+                .takes_value(true),
+        )
+        .get_matches();
+    let manifest_file_path = matches
+        .value_of("manifest")
+        .expect("Manifest path is required, but not found");
+    let file = File::open(manifest_file_path)?;
+    let _parser = Parser::new(file);
+    Ok(())
+}

components/support/nimbus-fml/src/parser.rs

@@ -0,0 +1,13 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this
+* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use std::fs::File;
+
+pub struct Parser {}
+
+impl Parser {
+    pub fn new(_file: File) -> Self {
+        unimplemented!()
+    }
+}